chains

Documentation

Index

• type ChainConfig
• type ChainParameters
• type Manager
  • func New(config *ManagerConfig) Manager
• type ManagerConfig
• type MockManager
  • func (mm MockManager) AddRegistrant(Registrant)
  • func (mm MockManager) Alias(ids.ID, string) error
  • func (mm MockManager) Aliases(ids.ID) ([]string, error)
  • func (mm MockManager) ForceCreateChain(ChainParameters)
  • func (mm MockManager) IsBootstrapped(ids.ID) bool
  • func (mm MockManager) Lookup(s string) (ids.ID, error)
  • func (mm MockManager) LookupVM(s string) (ids.ID, error)
  • func (mm MockManager) PrimaryAlias(ids.ID) (string, error)
  • func (mm MockManager) PrimaryAliasOrDefault(ids.ID) string
  • func (mm MockManager) QueueChainCreation(ChainParameters)
  • func (mm MockManager) RemoveAliases(ids.ID)
  • func (mm MockManager) Router() router.Router
  • func (mm MockManager) Shutdown()
  • func (mm MockManager) StartChainCreator(ChainParameters)
  • func (mm MockManager) SubnetID(ids.ID) (ids.ID, error)
• type Registrant
• type Subnet
• type SubnetConfig

Types

type ChainConfig

type ChainConfig struct {
	Config  []byte
	Upgrade []byte
}

ChainConfig is configuration settings for the current execution. [Config] is the user-provided config blob for the chain. [Upgrade] is a chain-specific blob for coordinating upgrades.

type ChainParameters

type ChainParameters struct {
	// The ID of the chain being created.
	ID ids.ID
	// ID of the subnet that validates this chain.
	SubnetID ids.ID
	// The genesis data of this chain's ledger.
	GenesisData []byte
	// The ID of the vm this chain is running.
	VMID ids.ID
	// The IDs of the feature extensions this chain is running.
	FxIDs []ids.ID
	// Should only be set if the default beacons can't be used.
	CustomBeacons validators.Set
}

ChainParameters defines the chain being created

type Manager

type Manager interface {
	ids.Aliaser

	// Return the router this Manager is using to route consensus messages to chains
	Router() router.Router

	// Queues a chain to be created in the future after chain creator is unblocked.
	// This is only called from the P-chain thread to create other chains
	// Queued chains are created only after P-chain is bootstrapped.
	// This assumes only chains in whitelisted subnets are queued.
	QueueChainCreation(ChainParameters)

	// Add a registrant [r]. Every time a chain is
	// created, [r].RegisterChain([new chain]) is called.
	AddRegistrant(Registrant)

	// Given an alias, return the ID of the chain associated with that alias
	Lookup(string) (ids.ID, error)

	// Given an alias, return the ID of the VM associated with that alias
	LookupVM(string) (ids.ID, error)

	SubnetID(chainID ids.ID) (ids.ID, error)

	// Returns true iff the chain with the given ID exists and is finished bootstrapping
	IsBootstrapped(ids.ID) bool

	// Starts the chain creator with the initial platform chain parameters, must
	// be called once.
	StartChainCreator(platformChain ChainParameters)

	Shutdown()
}

Manager manages the chains running on this node. It can:

• Create a chain
• Add a registrant. When a chain is created, each registrant calls RegisterChain with the new chain as the argument.
• Manage the aliases of chains

func New

func New(config *ManagerConfig) Manager

New returns a new Manager

type ManagerConfig

type ManagerConfig struct {
	StakingEnabled bool            // True iff the network has staking enabled
	StakingCert    tls.Certificate // needed to sign snowman++ blocks
	StakingBLSKey  *bls.SecretKey
	TracingEnabled bool
	// Must not be used unless [TracingEnabled] is true as this may be nil.
	Tracer                      trace.Tracer
	Log                         logging.Logger
	LogFactory                  logging.Factory
	VMManager                   vms.Manager // Manage mappings from vm ID --> vm
	DecisionAcceptorGroup       snow.AcceptorGroup
	ConsensusAcceptorGroup      snow.AcceptorGroup
	DBManager                   dbManager.Manager
	MsgCreator                  message.Creator    // message creator, shared with network
	Router                      router.Router      // Routes incoming messages to the appropriate chain
	Net                         network.Network    // Sends consensus messages to other validators
	ConsensusParams             avcon.Parameters   // The consensus parameters (alpha, beta, etc.) for new chains
	Validators                  validators.Manager // Validators validating on this chain
	NodeID                      ids.NodeID         // The ID of this node
	NetworkID                   uint32             // ID of the network this node is connected to
	Server                      server.Server      // Handles HTTP API calls
	Keystore                    keystore.Keystore
	AtomicMemory                *atomic.Memory
	AVAXAssetID                 ids.ID
	XChainID                    ids.ID
	CriticalChains              ids.Set         // Chains that can't exit gracefully
	TimeoutManager              timeout.Manager // Manages request timeouts when sending messages to other validators
	Health                      health.Registerer
	RetryBootstrap              bool                    // Should Bootstrap be retried
	RetryBootstrapWarnFrequency int                     // Max number of times to retry bootstrap before warning the node operator
	SubnetConfigs               map[ids.ID]SubnetConfig // ID -> SubnetConfig
	ChainConfigs                map[string]ChainConfig  // alias -> ChainConfig
	// ShutdownNodeFunc allows the chain manager to issue a request to shutdown the node
	ShutdownNodeFunc func(exitCode int)
	MeterVMEnabled   bool // Should each VM be wrapped with a MeterVM
	Metrics          metrics.MultiGatherer

	ConsensusGossipFrequency time.Duration

	GossipConfig sender.GossipConfig

	// Max Time to spend fetching a container and its
	// ancestors when responding to a GetAncestors
	BootstrapMaxTimeGetAncestors time.Duration
	// Max number of containers in an ancestors message sent by this node.
	BootstrapAncestorsMaxContainersSent int
	// This node will only consider the first [AncestorsMaxContainersReceived]
	// containers in an ancestors message it receives.
	BootstrapAncestorsMaxContainersReceived int

	ApricotPhase4Time            time.Time
	ApricotPhase4MinPChainHeight uint64

	// Tracks CPU/disk usage caused by each peer.
	ResourceTracker timetracker.ResourceTracker

	StateSyncBeacons []ids.NodeID
}

type MockManager

type MockManager struct{}

MockManager implements Manager but does nothing. Always returns nil error. To be used only in tests

func (MockManager) AddRegistrant

func (mm MockManager) AddRegistrant(Registrant)

func (MockManager) Alias

func (mm MockManager) Alias(ids.ID, string) error

func (MockManager) Aliases

func (mm MockManager) Aliases(ids.ID) ([]string, error)

func (MockManager) ForceCreateChain

func (mm MockManager) ForceCreateChain(ChainParameters)

func (MockManager) IsBootstrapped

func (mm MockManager) IsBootstrapped(ids.ID) bool

func (MockManager) Lookup

func (mm MockManager) Lookup(s string) (ids.ID, error)

func (MockManager) LookupVM

func (mm MockManager) LookupVM(s string) (ids.ID, error)

func (MockManager) PrimaryAlias

func (mm MockManager) PrimaryAlias(ids.ID) (string, error)

func (MockManager) PrimaryAliasOrDefault

func (mm MockManager) PrimaryAliasOrDefault(ids.ID) string

func (MockManager) QueueChainCreation

func (mm MockManager) QueueChainCreation(ChainParameters)

func (MockManager) RemoveAliases

func (mm MockManager) RemoveAliases(ids.ID)

func (MockManager) Router

func (mm MockManager) Router() router.Router

func (MockManager) Shutdown

func (mm MockManager) Shutdown()

func (MockManager) StartChainCreator

func (mm MockManager) StartChainCreator(ChainParameters)

func (MockManager) SubnetID

func (mm MockManager) SubnetID(ids.ID) (ids.ID, error)

type Registrant

type Registrant interface {
	// Called when the chain described by [engine] is created
	// This function is called before the chain starts processing messages
	// [engine] should be an avalanche.Engine or snowman.Engine
	RegisterChain(name string, engine common.Engine)
}

Registrant can register the existence of a chain

type Subnet

type Subnet interface {
	common.Subnet
	// contains filtered or unexported methods
}

Subnet keeps track of the currently bootstrapping chains in a subnet. If no chains in the subnet are currently bootstrapping, the subnet is considered bootstrapped.

type SubnetConfig

type SubnetConfig struct {
	sender.GossipConfig

	// ValidatorOnly indicates that this Subnet's Chains are available to only subnet validators.
	ValidatorOnly       bool                 `json:"validatorOnly" yaml:"validatorOnly"`
	ConsensusParameters avalanche.Parameters `json:"consensusParameters" yaml:"consensusParameters"`
}